Good Riddles

 
Riddle (medium)

Question: What goes up AND comes down?

Mass (easy)

Question: What can float but can't sink.

Riddle #755 (medium)

Question: In 1940, a correspondent proposed the following question:

A man's age at death was one twenty-ninth of the year of his birth. How old was he in 1900?

Question: A boy was born before his father, killed his mother, and married his sister. How is this possible?

Question: What has feet and legs, but nothing else?